feat(interaction): add .decode method (#24)

src/limit-order/interaction.spec.ts

@@ -0,0 +1,15 @@
+import {Interaction} from './interaction'
+import {Address} from '../address'
+
+describe('Interaction', () => {
+    it('should encode/decode', () => {
+        const interaction = new Interaction(
+            Address.fromBigInt(1337n),
+            '0xdeadbeef'
+        )
+
+        expect(Interaction.decode(interaction.encode())).toStrictEqual(
+            interaction
+        )
+    })
+})

src/limit-order/interaction.ts

@@ -1,4 +1,4 @@
-import {isHexBytes, trim0x} from '@1inch/byte-utils'
+import {BytesIter, isHexBytes, trim0x} from '@1inch/byte-utils'
 import assert from 'assert'
 import {Address} from '../address'
 
@@ -7,6 +7,17 @@ export class Interaction {
         assert(isHexBytes(data), 'Interaction data must be valid hex bytes')
     }
 
+    /**
+     * Create `Interaction` from bytes
+     *
+     * @param bytes Hex string with 0x. First 20 bytes are target, then data
+     */
+    public static decode(bytes: string): Interaction {
+        const iter = BytesIter.String(bytes)
+
+        return new Interaction(new Address(iter.nextUint160()), iter.rest())
+    }
+
     /**
      * Hex string with 0x. First 20 bytes are target, then data
      */